| 摘要 |
The oxide composites comprise 60-95 wt.% cordierite and 5-40 wt.% celsian, and 60-90 wt.% cordierite, 10 wt.% celsian and 10-30 wt.% aluminum titanate. The composite material is produced by (a) mixing cordierite from the calcined starting materials at 600-800 deg.C for 2 hrs., with celsian by adding 0.1 mol% lithium carbonate to the source materials and firing them at 1,000-1,400 deg.C for 6 hrs., by dry process, (b) molding the cordierite-celsian mixture by isostatic pressing, (c) sintering it at 1,170-1,420 deg.C. In the case of cordierite-celsian-aluminum titanate composite, aluminum titanate is synthesized at 1,300-1,500 deg.C in the molar ratio of titania to alumina, 1:1 and added to the celsian and cordierite mixture.
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